Avaliação da fertilidade do Latossolo Amarelo textura média para o cultivo de plantas de Sorriso-de-Maria (Aster ericoides) cv. Renna primeiro ciclo

Abstract

The Sorriso-de-Maria (Aster ericoides) cv. Renna is a recent ornamental plant in the market, which in recent years has aroused the interest of most producers and the general public, due to the beauty of the flowers and the profitability of the floriculture, attracting the interest of the entrepreneur as a form of income. And, to obtain a good production of flowers, it is necessary to improve the cultivation, performing the practice of liming and liquid fertilization with doses and sources of macro and micronutrients. Thus, the objective of the research was to evaluate the fertility of the Yellow Latosol medium texture for the cultivation with plants of Sorriso-de-Maria (Aster ericoides) cv. Renna first cycle, through the effect of the omission of macro and micronutrients on growth biometric variables and the dry mass production of the leaves, floral branches plus flowers and total dry mass. The experiment was carried out in the municipality of Igarapé-Açu (Mesoregion of the Northeast of Paraense and Micragregion Bragantina), in a greenhouse, located in the Farm to School Igarapé-Açu (FEIGA), belonging to the Federal Rural University of Amazonia (UFRA). The experimental design was completely randomized with 10 treatments and 4 replicates. The following biometric variables were evaluated: plant height, number of leaves, leaf length, leaf width, leaf area, leaf dry mass, floral bouquet plus flowers and total. The results obtained allowed to infer that plants of Sorriso-de-Maria (Aster ericoides) cultivate Renna, cultivated in substratum of Yellow Latosol medium texture are demanding in the studied nutrients, emphasizing the phosphorus and potassium. The survey also indicated, the need for liming for this species. And the biometric variables that presented the most reduction were the height of the plant and the dry mass of the leaves. The decreasing sequence of plant height based on the mean test was: Full plus liming > Full less liming > ON > OS = OMg > OMicro > OCa = OP > Witness > OK. However, the decreasing sequence of the dry mass of the leaves based on the mean test was: Complete with liming > OMg > Witness without liming > OMicro > OS > OP > ON = OCa > OK > Complete without liming.